SLOB

The psoas/iliacus is lengthened (intrapelvic) and the rectus femoris recessed into the rest of the quadriceps (direct head divided but reflected head remains creating a visible notch in the new bone which allows following real old socket repair from the new. SPMLs handle the rest of muscular tension balancing.

Stacked 'elevators' (narrow underneath wide) allow very controlled contouring of the acetabular wall being reshaped around the femoral head.